16
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Piping installation
Installer and user reference guide
71
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
16.2 Using stop valves and service ports
For more information about the card on the unit, see
44].
WARNING
When stop valves are closed during service, the pressure of the closed circuit will
increase due to high ambient temperature. Make sure the pressure is kept below the
design pressure.
16.2.1 Overview stop valves for refrigeration and air-conditioner
a
c
d
b
a
Gas side stop valve for refrigeration
b
Liquid side stop valve for refrigeration
c
Gas side stop valve for air conditioner
d
Liquid side stop valve for air conditioner
16.2.2 Overview stop valves for maintenance
NOTICE
Operate these stop valves ONLY during maintenance. During normal operation they
are open. Be aware that if you close these stop valves during maintenance, you close
the circuit of the liquid receiver and pressure might increase. As the liquid receiver
has a safety valve which is set to 86 bar, closing these maintenance stop valves might
activate the safety valve.
ALWAYS and REGULARLY check the pressure in the circuit and prevent that the safety
valve is activated.